Potassium Iodate


Often added to salt as a means of fortifying it with iodine, a nutrient that is essential for thyroid function. Can be found in many breads as a dough strengthener, which is more of a concern.
Health Impact
Health impact of potassium iodate largely depends on the level of consumption. Accidental poisoning by potassium iodate can occur when 187-470 mg are consumed depending on body weight. Symptoms include nausea, vomiting, diarrhea, and can even be life-threatening if consumed in large amounts. Some people, such as those with thyroid disease, are especially sensitive to iodine intake and should try to avoid potassium iodate in baked goods. Another possible concern is that iodate breaks down in dough and in the body to form iodide. High doses of potassium iodide has been shown to cause cancer in rats, suggesting it may be a weak carcinogen. The same research found that it also increased the potency of a known carcinogen.
Studies on the carcinogenicity of potassium iodide in F344 rats
Potassium iodate toxic retinopathy: a report of five cases
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